Billy Rosewood is a fictional character from the 1984 film Beverly Hills Cop. He is portrayed by actor Judge Reinhold and serves as a police officer in the Beverly Hills Police Department. Rosewood is known for his friendly demeanor and eagerness to assist his partner, Axel Foley, played by Eddie Murphy, in solving crimes. In the film, Billy often provides comic relief with his naive and enthusiastic personality. He is characterized by his loyalty and determination, helping to navigate the challenges that arise during their investigation. His interactions with Axel highlight the contrast between their different approaches to law enforcement.